Type-writing machine.



No. 731,834. PATENTED JUNE 23, 1903.

- P. P.- ANDEBSON.

TYPE WRITING MACHINE.

APPLICATION FILED} APR. 26, 1902. N0 MODEL.

.No. 731,834. Patented June 23,1903.

UNITED STATES ATENT FFICE.

' FREDERICK F. ANDERSON, OF NEW YORK, N. Y., ASSIGNOR OF ONE- EIGHTH TO EDWARD J. MELLEN, OF WIOHITA, KANSAS.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 731,834, dated June 23, 1903.

Application filed April 26, 1902. Serial No. 104,769. (No model.)

To aZZ whom it may concerns Into the opening 0 of the cap 0 the plugD Be it known that I, FREDERICK F. ANDER- is-threaded. This plug is provided with an SON, a citizen ofnthe United States, and aresienlarged head, so that it may be easily re- 55 dent of the borough of Manhattan, in the moved and replaced, when desired. The ob- 5 county of New York, city and State of New ject of the removable plug D is to admit of York, have invented certain new and useful the injection of a suitable softening liquid Improvements in Type -Writing Machines,0f into the interior of the cylinder, so that it which the followingis'a specification. may pass through the perforations of the in- 60 My invention relates particularly to the her cylinder D and saturate the absorbent I0 platen-roller; audits objects are, amongothcoating E in the interior of theouterlayer A.

ers, to provide means whereby the said platen In this manner it will be seen that the origimaybe maintainedin an elastic condition and nal elasticity of the platen may be mainenabled to better act in conjunction withthe tained for a considerable period through the 6 types to cause a clear impression to be made application of the softening fluid.

I 5 upon the paper. It consists of the combina- The ratchet-disk F is secured to the cap 0 tion of parts and arrangement of details hereby the screw-bolts F or other suitable means. inafter described and claimed ,and illustrated What I claim isin the accompanying drawings referred to 1. In a platenroll for type writing ma- 7o herein. chines, the combination of an outer elastic .20 3 In the said drawings, Figure 1 is a side view layer and an inner absorbent layer, an openof a platen-cylinder embodying my improveing in the end of said platen, a removable ments. Fig. 2 consists of detail views of the plug in said opening and a conical recess in disks secured to the ends ofsaid cylinder. the outer end of said plug. 7 a Fig. 3 is a vertical longitudinal section of the 2. In a platen, the combination of an outer 2 5 cylinder with the central portion cut away. layer of elastic material, an inner layer of ab- I Fig. 4is a like view of the inside cylinder cap sorbent substance; the inner surfaces of the and plug, said outer layer being provided with a plu The ends of the cylinder are provided with rality of recesses into which the said absorb- 8o 1 central conical recesses adapted to receive ent substance enters, an opening in the end 1 3o suitable projections on the carriage, whereby of said platen and a removable plug in said it is rotatably mounted thereon. These reopening.

"cesses D' F are located in the plug D and 3. In a platen-cylinder, the combination of ratchet-disk F, respectively. an outer elastic layer, an inner rigid cylin- 85 The outer layer A of the cylinder is comder, caps closing the ends of said cylinder, 35 posed of rubber or other suitable composition annular grooves in said caps and projecting 1 which will present an elastic yet firm re'sistportions of the said outer layer held within ance to the impact of the types. The ends of the said annular grooves.

. this outer layer are rabbeted and enter annu- 4. In a platen, the combination of an outer o lar grooves c on the inner sides of the caps elastic layer, an inner metallic cylinder, abo Oand O. sorbent substance interposed between, a cap A series of annular grooves or recesses A closing the ends of said inner cylinder, a reare located on the interior of the outer layer. movable plug in said cap and perforations in I These grooves are filled ground sponge, felt, the said inner cylinder, whereby a softening 5 or other absorbent material, which forms a substance may be applied to the said absorb- 5 coating E, covering the entire inner surfaces ent material. of the outer layer A. The inner cylinder B Witness my hand, this 25th day of April, is provided with perforations B, communi- 1902, at the cityof New York,county and State cating from the interior thereof with the abof New York.

3 sorbent material E. The ends of this inner FREDERICK F. ANDERSON. 5o cylinder are interiorly threaded and receive Witnesses:

the exteriorly-threaded inner portions 0 of HERMAN MEYER,

the caps O and C. ERNEST H. BOISE. 

